问检查两个日期是否相同的条件python while循环

EN

def daysBetweenDates(year1, month1, day1, year2, month2, day2):
    day_count = 0
    while (year2 != year1) and (month2 != month1) and (day2! = day 1): 
       # print "in loop" // tester
        if (day2 != 0):
            day2 = day2 - 1
            day_count = day_count + 1
        else:
            if(month2 != 0):
                month2 = month2 - 1
                if month2 == (9 or 4 or 6 or 11):
                    day2 = 30
                if month2 == 2:
                    day2 = 28
                if (month2 == 2) and (year2 % 4):
                    day2 = 29
                else:
                    day2 == 31
            else:

                year2 = year2 - 1
                month2 = 12
    #print day_count //tester
    return day_count

# Test routine

def test():
    test_cases = [((2012,1,1,2012,2,28), 58), 
                  ((2012,1,1,2012,3,1), 60),
                  ((2011,6,30,2012,6,30), 366),
                  ((2011,1,1,2012,8,8), 585 ),
                  ((1900,1,1,1999,12,31), 36523)]
    for (args, answer) in test_cases:
        result = daysBetweenDates(*args)
        if result != answer:
            print "Test with data:", args, "failed"
        else:
            print "Test case passed!"

test()